diff --git a/include/linux/serial.h b/include/linux/serial.h
index 90e9f98..3504f42 100644
--- a/include/linux/serial.h
+++ b/include/linux/serial.h
@@ -12,9 +12,12 @@
 
 #include <linux/types.h>
 
+#include <linux/tty_flags.h>
+
 #ifdef __KERNEL__
 #include <asm/page.h>
 
+
 /*
  * Counters of the input lines (CTS, DSR, RI, CD) interrupts
  */
@@ -94,78 +97,6 @@
 #define UART_STARTECH		0x04
 #define UART_NATSEMI		0x08
 
-/*
- * Definitions for async_struct (and serial_struct) flags field
- *
- * Define ASYNCB_* for convenient use with {test,set,clear}_bit.
- */
-#define ASYNCB_HUP_NOTIFY	 0 /* Notify getty on hangups and closes
-				    * on the callout port */
-#define ASYNCB_FOURPORT		 1 /* Set OU1, OUT2 per AST Fourport settings */
-#define ASYNCB_SAK		 2 /* Secure Attention Key (Orange book) */
-#define ASYNCB_SPLIT_TERMIOS	 3 /* Separate termios for dialin/callout */
-#define ASYNCB_SPD_HI		 4 /* Use 56000 instead of 38400 bps */
-#define ASYNCB_SPD_VHI		 5 /* Use 115200 instead of 38400 bps */
-#define ASYNCB_SKIP_TEST	 6 /* Skip UART test during autoconfiguration */
-#define ASYNCB_AUTO_IRQ		 7 /* Do automatic IRQ during
-				    * autoconfiguration */
-#define ASYNCB_SESSION_LOCKOUT	 8 /* Lock out cua opens based on session */
-#define ASYNCB_PGRP_LOCKOUT	 9 /* Lock out cua opens based on pgrp */
-#define ASYNCB_CALLOUT_NOHUP	10 /* Don't do hangups for cua device */
-#define ASYNCB_HARDPPS_CD	11 /* Call hardpps when CD goes high  */
-#define ASYNCB_SPD_SHI		12 /* Use 230400 instead of 38400 bps */
-#define ASYNCB_LOW_LATENCY	13 /* Request low latency behaviour */
-#define ASYNCB_BUGGY_UART	14 /* This is a buggy UART, skip some safety
-				    * checks.  Note: can be dangerous! */
-#define ASYNCB_AUTOPROBE	15 /* Port was autoprobed by PCI or PNP code */
-#define ASYNCB_LAST_USER	15
-
-/* Internal flags used only by kernel */
-#define ASYNCB_INITIALIZED	31 /* Serial port was initialized */
-#define ASYNCB_SUSPENDED	30 /* Serial port is suspended */
-#define ASYNCB_NORMAL_ACTIVE	29 /* Normal device is active */
-#define ASYNCB_BOOT_AUTOCONF	28 /* Autoconfigure port on bootup */
-#define ASYNCB_CLOSING		27 /* Serial port is closing */
-#define ASYNCB_CTS_FLOW		26 /* Do CTS flow control */
-#define ASYNCB_CHECK_CD		25 /* i.e., CLOCAL */
-#define ASYNCB_SHARE_IRQ	24 /* for multifunction cards, no longer used */
-#define ASYNCB_CONS_FLOW	23 /* flow control for console  */
-#define ASYNCB_FIRST_KERNEL	22
-
-#define ASYNC_HUP_NOTIFY	(1U << ASYNCB_HUP_NOTIFY)
-#define ASYNC_SUSPENDED		(1U << ASYNCB_SUSPENDED)
-#define ASYNC_FOURPORT		(1U << ASYNCB_FOURPORT)
-#define ASYNC_SAK		(1U << ASYNCB_SAK)
-#define ASYNC_SPLIT_TERMIOS	(1U << ASYNCB_SPLIT_TERMIOS)
-#define ASYNC_SPD_HI		(1U << ASYNCB_SPD_HI)
-#define ASYNC_SPD_VHI		(1U << ASYNCB_SPD_VHI)
-#define ASYNC_SKIP_TEST		(1U << ASYNCB_SKIP_TEST)
-#define ASYNC_AUTO_IRQ		(1U << ASYNCB_AUTO_IRQ)
-#define ASYNC_SESSION_LOCKOUT	(1U << ASYNCB_SESSION_LOCKOUT)
-#define ASYNC_PGRP_LOCKOUT	(1U << ASYNCB_PGRP_LOCKOUT)
-#define ASYNC_CALLOUT_NOHUP	(1U << ASYNCB_CALLOUT_NOHUP)
-#define ASYNC_HARDPPS_CD	(1U << ASYNCB_HARDPPS_CD)
-#define ASYNC_SPD_SHI		(1U << ASYNCB_SPD_SHI)
-#define ASYNC_LOW_LATENCY	(1U << ASYNCB_LOW_LATENCY)
-#define ASYNC_BUGGY_UART	(1U << ASYNCB_BUGGY_UART)
-#define ASYNC_AUTOPROBE		(1U << ASYNCB_AUTOPROBE)
-
-#define ASYNC_FLAGS		((1U << (ASYNCB_LAST_USER + 1)) - 1)
-#define ASYNC_USR_MASK		(ASYNC_SPD_MASK|ASYNC_CALLOUT_NOHUP| \
-		ASYNC_LOW_LATENCY)
-#define ASYNC_SPD_CUST		(ASYNC_SPD_HI|ASYNC_SPD_VHI)
-#define ASYNC_SPD_WARP		(ASYNC_SPD_HI|ASYNC_SPD_SHI)
-#define ASYNC_SPD_MASK		(ASYNC_SPD_HI|ASYNC_SPD_VHI|ASYNC_SPD_SHI)
-
-#define ASYNC_INITIALIZED	(1U << ASYNCB_INITIALIZED)
-#define ASYNC_NORMAL_ACTIVE	(1U << ASYNCB_NORMAL_ACTIVE)
-#define ASYNC_BOOT_AUTOCONF	(1U << ASYNCB_BOOT_AUTOCONF)
-#define ASYNC_CLOSING		(1U << ASYNCB_CLOSING)
-#define ASYNC_CTS_FLOW		(1U << ASYNCB_CTS_FLOW)
-#define ASYNC_CHECK_CD		(1U << ASYNCB_CHECK_CD)
-#define ASYNC_SHARE_IRQ		(1U << ASYNCB_SHARE_IRQ)
-#define ASYNC_CONS_FLOW		(1U << ASYNCB_CONS_FLOW)
-#define ASYNC_INTERNAL_FLAGS	(~((1U << ASYNCB_FIRST_KERNEL) - 1))
 
 /*
  * Multiport serial configuration structure --- external structure